dial and lateral play (
Figure 102
). If any play exists,
replace the connecting rod (if piston pin outside di-
ameter is within specification).
7. Check the connecting rod oil clearance as de-
scribed in this chapter.
Connecting Rod Oil Clearance
1. Wipe the bearing inserts and crankpins clean. In-
stall the inserts (A,
Figure 98
) into their original
connecting rod or rod cap.
2. Place a piece of Plastigage on the crankpin paral-
lel to the crankshaft (
Figure 103
).
NOTE
Each connecting rod has a
Y
em
bossed on one side. (
Figure 100
). The
connecting rod must be installed so
this side faces the left crankshaft end
(the tapered end).
3. Install rod and cap. Be sure the weight marks
(
Figure 99
) on the side of the rod and cap align.
CAUTION
When torquing a connecting rod nut
to specification, once 43 N•m (32
ft. lb.) of torque is applied, tightening
cannot be stopped until the final
torque value is achieved. If tightening
is interrupted between 43 48 N•m
(32 35 ft. lb.), loosen the nut to less
than 43 N•m (32 ft. lb.), then tighten it
to 48 N•m (35 ft. lb.) in one continu
ous motion.
4. Using a beam-type torque wrench, tighten each
connecting rod nut to 48 N•m (35 ft.-lb.). Apply
continuous torque when tightening the nut from 43
N•m (32 ft-lb.) to 48 N•m (35 ft.-lb.). Do not stop
tightening the nut until the final torque specification
is reached.
CAUTION
Do not rotate the crankshaft while
Plastigage is in place.
5. Remove the rod cap.
6. Determine the oil clearance by measuring the
width of flattened Plastigage according to the man-
ufacturer’s instructions (
Figure 103
). Replace the
bearings if the connecting rod oil clearance is out-
side the range specified in
Table 1
.
7. Clean all Plastigage from the crankshaft and
bearing inserts. Install the connecting rods as de-
scribed in this chapter.
Connecting Rod Bearing Selection
Bearing inserts are identified by color. To deter-
mine the proper bearing inserts, calculate the bear-
ing number as described below.
1. The connecting rods and caps are marked with a
No. 4 or No. 5 (
Figure 99
).
2. The crankweb is marked with a number (
Figure
104
) that relates to the connecting rod crankpin.
3. To select the proper bearing insert number, sub-
tract the crankpin number from the number on the
connecting rod and cap. For example, if the con-
necting rod is marked with a 4 and the matching
crankpin number is a 1, 4 - 1 = 3. The new bearing
insert is a No. 3.
ENGINE LOWER END
165
5
103
104
